:root {
  color-scheme: light dark;
  --background: #f4f7fb;
  --surface: #ffffff;
  --surface-muted: #e9eef6;
  --text: #172033;
  --muted: #4b5870;
  --border: #b9c4d6;
  --accent: #075db3;
  --accent-hover: #004783;
  --accent-contrast: #ffffff;
  --focus: #b54708;
  --positive: #17643a;
  --shadow: 0 0.35rem 1.2rem rgb(25 41 70 / 10%);
  --radius: 0.65rem;
  --reading-width: 70ch;
  --page-width: 76rem;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

main,
.site-header > nav,
body > footer {
  width: min(100% - 2rem, var(--page-width));
  margin-inline: auto;
}

main {
  padding-block: 2rem 4rem;
}

.experiment-page,
.hub-page,
.privacy-page {
  display: block;
  max-width: var(--reading-width);
  margin-inline: auto;
}

h1,
h2,
h3 {
  color: var(--text);
  line-height: 1.2;
  text-wrap: balance;
}

h1 {
  margin-block: 0.4rem 1rem;
  font-size: clamp(2rem, 7vw, 3.5rem);
  letter-spacing: -0.025em;
}

h2 {
  margin-block: 2.5rem 0.9rem;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

h3 {
  margin-block: 0 0.75rem;
  font-size: 1.15rem;
}

p,
li,
dd {
  max-width: var(--reading-width);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
}

button,
a {
  touch-action: manipulation;
}

:focus-visible {
  outline: 0.22rem solid var(--focus);
  outline-offset: 0.2rem;
  border-radius: 0.15rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  min-height: 4rem;
}

.site-header nav a:first-child {
  margin-right: auto;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

.site-header [aria-current="page"] {
  font-weight: 700;
  text-decoration-thickness: 0.18em;
}

.article-header,
.hub-page > header,
.privacy-page > header {
  padding-block: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lede {
  color: var(--muted);
  font-size: clamp(1.08rem, 2.5vw, 1.25rem);
}

.research-question,
.direct-answer,
.compatibility-boundary,
.next-step,
.privacy-page section {
  margin-block: 1.5rem;
  padding: 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.direct-answer {
  border-left: 0.35rem solid var(--positive);
}

.direct-answer h2,
.next-step h2,
.privacy-page section h2 {
  margin-top: 0;
}

.audit-labels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.65rem;
  margin-block: 1.5rem;
}

.audit-labels div {
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.45rem;
  background: var(--surface-muted);
}

.audit-labels dt {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.audit-labels dd {
  margin: 0.15rem 0 0;
  font-weight: 700;
}

.claim-card,
.page-grid > li {
  margin-block: 1rem;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.claim-card p:last-child,
.page-grid > li p:last-child {
  margin-bottom: 0;
}

.page-grid {
  display: grid;
  gap: 1rem;
  padding: 0;
  list-style: none;
}

.page-grid > li {
  margin: 0;
}

.page-grid > li > a {
  display: inline-block;
  font-size: 1.08rem;
  font-weight: 750;
}

.page-grid > li > span {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.83rem;
}

.table-wrap,
main table {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  border: 1px solid var(--border);
  background: var(--surface);
}

caption {
  padding: 0.75rem;
  color: var(--muted);
  font-weight: 700;
  text-align: left;
}

th,
td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-muted);
}

tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--surface-muted) 45%, var(--surface));
}

details {
  margin-block: 0.75rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

summary {
  cursor: pointer;
  font-weight: 750;
}

.sources ul {
  display: grid;
  gap: 0.6rem;
  padding-left: 1.25rem;
}

.primary-cta {
  display: inline-block;
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  border-radius: 0.45rem;
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 800;
  text-decoration: none;
}

.primary-cta:hover {
  background: var(--accent-hover);
  color: var(--accent-contrast);
}

body > footer {
  padding-block: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.consent-banner {
  position: fixed;
  z-index: 1000;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  max-width: 42rem;
  margin-inline: auto;
  padding: 1rem;
  border: 2px solid var(--text);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1rem 3rem rgb(0 0 0 / 28%);
}

.consent-banner p {
  margin-top: 0;
}

.consent-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.consent-actions button {
  min-height: 2.75rem;
  padding: 0.6rem 0.9rem;
  border: 2px solid var(--accent);
  border-radius: 0.4rem;
  background: var(--accent);
  color: var(--accent-contrast);
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.consent-actions button:last-child {
  background: var(--surface);
  color: var(--accent);
}

code {
  padding: 0.1em 0.3em;
  border-radius: 0.25rem;
  background: var(--surface-muted);
  color: var(--text);
}

@media (min-width: 46rem) {
  main {
    padding-block: 3rem 5rem;
  }

  .page-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .consent-banner {
    right: 1.5rem;
    bottom: 1.5rem;
    left: auto;
    margin: 0;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #101722;
    --surface: #182231;
    --surface-muted: #243247;
    --text: #f1f5fb;
    --muted: #bdc8da;
    --border: #52627a;
    --accent: #78b9ff;
    --accent-hover: #acd4ff;
    --accent-contrast: #071525;
    --focus: #ffb86b;
    --positive: #65d397;
    --shadow: 0 0.35rem 1.2rem rgb(0 0 0 / 28%);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  :root {
    color-scheme: light;
    --background: #ffffff;
    --surface: #ffffff;
    --surface-muted: #f1f1f1;
    --text: #000000;
    --muted: #333333;
    --border: #777777;
    --accent: #000000;
    --accent-hover: #000000;
    --shadow: none;
  }

  body {
    font-size: 11pt;
  }

  main,
  .site-header > nav,
  body > footer {
    width: 100%;
  }

  .experiment-page,
  .hub-page,
  .privacy-page {
    max-width: none;
  }

  .claim-card,
  .page-grid > li,
  details {
    break-inside: avoid;
    box-shadow: none;
  }

  .consent-banner {
    display: none;
  }

  a {
    color: #000000;
    text-decoration: underline;
  }
}